/*
 * Copyright 2022 Apollo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.ctrip.framework.apollo.portal.controller;

import com.ctrip.framework.apollo.common.dto.GrayReleaseRuleDTO;
import com.ctrip.framework.apollo.common.dto.NamespaceDTO;
import com.ctrip.framework.apollo.common.dto.ReleaseDTO;
import com.ctrip.framework.apollo.common.exception.BadRequestException;
import com.ctrip.framework.apollo.portal.environment.Env;
import com.ctrip.framework.apollo.portal.component.PermissionValidator;
import com.ctrip.framework.apollo.portal.component.config.PortalConfig;
import com.ctrip.framework.apollo.portal.entity.bo.NamespaceBO;
import com.ctrip.framework.apollo.portal.entity.model.NamespaceReleaseModel;
import com.ctrip.framework.apollo.portal.listener.ConfigPublishEvent;
import com.ctrip.framework.apollo.portal.service.NamespaceBranchService;
import com.ctrip.framework.apollo.portal.service.ReleaseService;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class NamespaceBranchController {

    private final PermissionValidator permissionValidator;
    private final ReleaseService releaseService;
    private final NamespaceBranchService namespaceBranchService;
    private final ApplicationEventPublisher publisher;
    private final PortalConfig portalConfig;

    public NamespaceBranchController(
            final PermissionValidator permissionValidator,
            final ReleaseService releaseService,
            final NamespaceBranchService namespaceBranchService,
            final ApplicationEventPublisher publisher,
            final PortalConfig portalConfig) {
        this.permissionValidator = permissionValidator;
        this.releaseService = releaseService;
        this.namespaceBranchService = namespaceBranchService;
        this.publisher = publisher;
        this.portalConfig = portalConfig;
    }

    @GetMapping("/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches")
    public NamespaceBO findBranch(@PathVariable String appId,
                                  @PathVariable String env,
                                  @PathVariable String clusterName,
                                  @PathVariable String namespaceName) {
        NamespaceBO namespaceBO = namespaceBranchService.findBranch(appId, Env.valueOf(env), clusterName, namespaceName);

        if (namespaceBO != null && permissionValidator.shouldHideConfigToCurrentUser(appId, env, namespaceName)) {
            namespaceBO.hideItems();
        }

        return namespaceBO;
    }

    @PreAuthorize(value = "@permissionValidator.hasModifyNamespacePermission(#appId, #namespaceName, #env)")
    @PostMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches")
    public NamespaceDTO createBranch(@PathVariable String appId,
                                     @PathVariable String env,
                                     @PathVariable String clusterName,
                                     @PathVariable String namespaceName) {

        return namespaceBranchService.createBranch(appId, Env.valueOf(env), clusterName, namespaceName);
    }

    @DeleteMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches/{branchName}")
    public void deleteBranch(@PathVariable String appId,
                             @PathVariable String env,
                             @PathVariable String clusterName,
                             @PathVariable String namespaceName,
                             @PathVariable String branchName) {

        boolean canDelete = permissionValidator.hasReleaseNamespacePermission(appId, namespaceName, env) ||
                (permissionValidator.hasModifyNamespacePermission(appId, namespaceName, env) &&
                        releaseService.loadLatestRelease(appId, Env.valueOf(env), branchName, namespaceName) == null);


        if (!canDelete) {
            throw new AccessDeniedException("Forbidden operation. "
                    + "Caused by: 1.you don't have release permission "
                    + "or 2. you don't have modification permission "
                    + "or 3. you have modification permission but branch has been released");
        }

        namespaceBranchService.deleteBranch(appId, Env.valueOf(env), clusterName, namespaceName, branchName);

    }


    @PreAuthorize(value = "@permissionValidator.hasReleaseNamespacePermission(#appId, #namespaceName, #env)")
    @PostMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches/{branchName}/merge")
    public ReleaseDTO merge(@PathVariable String appId, @PathVariable String env,
                            @PathVariable String clusterName, @PathVariable String namespaceName,
                            @PathVariable String branchName, @RequestParam(value = "deleteBranch", defaultValue = "true") boolean deleteBranch,
                            @RequestBody NamespaceReleaseModel model) {

        if (model.isEmergencyPublish() && !portalConfig.isEmergencyPublishAllowed(Env.valueOf(env))) {
            throw new BadRequestException("Env: %s is not supported emergency publish now", env);
        }

        ReleaseDTO createdRelease = namespaceBranchService.merge(appId, Env.valueOf(env), clusterName, namespaceName, branchName,
                model.getReleaseTitle(), model.getReleaseComment(),
                model.isEmergencyPublish(), deleteBranch);

        ConfigPublishEvent event = ConfigPublishEvent.instance();
        event.withAppId(appId)
                .withCluster(clusterName)
                .withNamespace(namespaceName)
                .withReleaseId(createdRelease.getId())
                .setMergeEvent(true)
                .setEnv(Env.valueOf(env));

        publisher.publishEvent(event);

        return createdRelease;
    }


    @GetMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches/{branchName}/rules")
    public GrayReleaseRuleDTO getBranchGrayRules(@PathVariable String appId, @PathVariable String env,
                                                 @PathVariable String clusterName,
                                                 @PathVariable String namespaceName,
                                                 @PathVariable String branchName) {

        return namespaceBranchService.findBranchGrayRules(appId, Env.valueOf(env), clusterName, namespaceName, branchName);
    }


    @PreAuthorize(value = "@permissionValidator.hasOperateNamespacePermission(#appId, #namespaceName, #env)")
    @PutMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/branches/{branchName}/rules")
    public void updateBranchRules(@PathVariable String appId, @PathVariable String env,
                                  @PathVariable String clusterName, @PathVariable String namespaceName,
                                  @PathVariable String branchName, @RequestBody GrayReleaseRuleDTO rules) {

        namespaceBranchService
                .updateBranchGrayRules(appId, Env.valueOf(env), clusterName, namespaceName, branchName, rules);

    }

}
